基于金字塔阵列微结构的低接触阻抗医用柔性电极。,Micromachines

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基于金字塔阵列微结构的低接触阻抗医用柔性电极。
Micromachines ( IF 3.0 ) Pub Date : 2020-01-01 , DOI: 10.3390/mi11010057
Song Wang ₁ , Jin Yan ₂ , Canlin Zhu ₁ , Jialin Yao ₂ , Qiusheng Liu ₁ , Xing Yang ₁

Affiliation

柔性电极广泛用于检测心电图，脑电图，眼科电图和肌电图等信号。这些电极也可用于可穿戴和可植入医疗系统。所收集的信号直接影响医生对患者病因的诊断，并与患者的生命安全密切相关。具有低接触阻抗的电极可以获取高质量的信号。本文中，我们建立了一种在聚二甲基硅氧烷（PDMS）基板上排列金字塔形微结构以增加电极接触面积的方法，并在PDMS基板和金属膜之间涂覆了聚对二甲苯过渡层以增强键合力，最终降低了柔性电极的阻抗。实验结果表明，该方法是有效的。制成的电极的接触面积每单位面积增加了18.15％，在20 Hz至1 kHz扫描频率下的接触阻抗在23至8kΩ的范围内，始终小于商用电极的接触阻抗。总体而言，这些结果表明，由于其低的接触阻抗和良好的生物相容性，所制成的电极具有出色的性能。这项研究还可以作为可穿戴和可植入医疗系统中进一步电极研究和应用的参考。这些结果表明，由于其低的接触阻抗和良好的生物相容性，制成的电极具有出色的性能。这项研究还可以作为可穿戴和可植入医疗系统中进一步电极研究和应用的参考。这些结果表明，由于其低的接触阻抗和良好的生物相容性，制成的电极具有出色的性能。这项研究还可以作为可穿戴和可植入医疗系统中进一步电极研究和应用的参考。

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A Low Contact Impedance Medical Flexible Electrode Based on a Pyramid Array Micro-Structure.

Flexible electrodes are extensively used to detect signals in electrocardiography, electroencephalography, electro-ophthalmography, and electromyography, among others. These electrodes can also be used in wearable and implantable medical systems. The collected signals directly affect doctors' diagnoses of patient etiology and are closely associated with patients' life safety. Electrodes with low contact impedance can acquire good quality signals. Herein, we established a method of arraying pyramidal microstructures on polydimethylsiloxane (PDMS) substrates to increase the contact area of electrodes, and a parylene transitional layer is coated between PDMS substrates and metal membranes to enhance the bonding force, finally reducing the impedance of flexible electrodes. Experimental results demonstrated that the proposed methods were effective. The contact area of the fabricated electrode increased by 18.15% per unit area, and the contact impedance at 20 Hz to 1 kHz scanning frequency ranged from 23 to 8 kΩ, which was always smaller than that of a commercial electrode. Overall, these results indicated the excellent performance of the fabricated electrode given its low contact impedance and good biocompatibility. This study can also serve as a reference for further electrode research and application in wearable and implantable medical systems.

更新日期：2020-01-01

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